Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study
AbstractIt is well known that fibers improve the performance of cementitious composites by acting as bridging ligaments in cracks. Such bridging behavior is often studied through fiber pullout tests. The relation between the pullout force vs. slip end displacement is characteristic of the fiber-matrix interface. However, such a relation varies significantly with the fiber inclination angle. In the current work, we establish a numerical model to simulate the entire pullout process by explicitly representing the fiber, matrix and the interface for arbitrary fiber orientations. Cohesive elements endorsed with mixed-mode fracture capacities are implemented to represent the bond-slip behavior at the interface. Contact elements with Coulomb’s friction are placed at the interface to simulate frictional contact. The bond-slip behavior is first calibrated through pull-out curves for fibers aligned with the loading direction, then validated against experimental results for steel fibers oriented at 30
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Zhang, H.; Yu, R.C. Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study. Materials 2016, 9, 800.
Zhang H, Yu RC. Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study. Materials. 2016; 9(10):800.Chicago/Turabian Style
Zhang, Hui; Yu, Rena C. 2016. "Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study." Materials 9, no. 10: 800.
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